Boiler.



v A. M. URISTA.

\ BOILER.

APPLICATION FILED IBB.17, 1912.

. 1,078,177, Patnted Nov. 11, 1-913.

COLUMBIA PLANOURAPH C0.. WASHINGTON. D. c.

isornnre i Specification of'rLetters Patent. i

Patented N0v.11,1913.

Application led February 17, 1912. Serial No. 678,248.

To all whom t may concern.' y

Be it known that I, ADOLFO MARTINEZ Umsrn, citizen of the United Mexican States, residing at the city of Mexico, Fed eral District, Mexico, have invented certain new and useful Improvements in Evaporation Systems for Boilers, of which the fol* lowing is a specification.

My invention relates to an improvement in evaporation systems for increasing the heating surface in boilers for all purposes.

My invention especially relates to systems in which boilers are heated by liquid combustibles such as crude oil, or petroleum, which is mixed with air under pressure.

In order that my invention may be fully understood I will proceed to describe it with reference to the accompanying drawing in which Figure 1 is a vertical cross section of my improved boiler in which my evaporation system is employed. Fig. 2 is a side elevation of the same partly in section at the front end. t

l is a double cylindrical outer shell providing an annular outer liquid chamber and 2 is a double cylindrical inner shell, providing an annular inner liquid chamber, from which the outer shell is spaced.

The outer and inner liquid vchambers are connected by radial tubes 8 extending across the space between the shells. All the spaces 4 between the inner wall of the outer shell and the outer wall of the inner shell and within the inner wall of the inner shell are filled with stones or volcanic lava such as pumice stone or fire clay. At lthe front end of the boiler is located a fire screen of similar material conveniently held between two circular perforated plates. The front plate of the boiler is provided with a door through which the fuel is ignited and 'spaced from the fire screen so as to provide an air chamber. The rear plate of the boiler is also spaced from the rear end of the shells in order to provide a collecting chamber 9, the purpose of which will be hereinafter explained. l

The fire screen serves as a mixer of crude oil such as petroleum, which enters, for eX- ample, through a pipe 6 inserted through the front air chamber into the fire screen, and air, led into the front air chamber through a pipe 7 in proportion of one part of oil to five parts of air. The petroleum is injected under a pressure of five centimeters, and the air under a pressure of fty centimeters, and the mixture is drawn through the stone filling by means of suction applied to a pipe 8 extending from the collecting chamber 9 .at the rear end of the boiler, which mixture is completely burned in said spaces. In this manner I utilize 94 per cent. of the heat, and smoke and odors resulting from the combustion are avoided.

The residue, if any, from the burning mixture, together with any incombustible or y un-burned foreign matter which may be contained therein, will collect in the chamber 9 as the mixture is drawn through said chamber and into pipe 8, and may be removed in any desired manner at the conclusion of the evaporating operation.

The boiler may be constructed as a rightangled crate, or a crate of lcurved pipes joined together; and as above described, the surrounding spaces are filled with volcanic lava etc., the crate being inclosed in a shell or Cask.

With my boiler I am able to evaporate one liter of water an hour with one square decimeter of evaporation surface.

The proportion of oil and air may be changed to one part oil and seven parts air.

Having thus described my invention the following is what I claim as new therein and desire to secure by Letters Patent:

1. A boiler having a fire screen, and an air chamber in advance of the same at its front end, and a collecting chamber at its rear end; in combination with a pipe leading into said fire screen for supplying oil thereto; a pipe leading int-o said air chamber, for supplying air under pressure to that chamber for admixture withthe oil in said re screen; and a suction pipe leading from said collecting chamber, for drawing the mixture of oil and air through the boiler.

2. A boiler provided at its front end with a fire screen comprising a pair of spaced,

Vperforated plates and a filling of refractory material therebetween, and with an air chamber in advance of said re screen, and at its from said collecting chamber, for drawing rear yend with a Collecting chamber; in comthe mixture of oil and air through the boiler. 10 bination with a pipe, leading into the space In testimony whereof I have aiiixed my between said plates, for supplying oil to signature in presence of two Witnesses.

Y said re screen; a pipe leading into said air ADOLFO MARTINEZ RISTA.

chamber, for supplying air under pressure to Witnesses: that chamber, for admiXture with the oil in MANUEL RUIZ SANDOVAL, said lire screen; andv a suction Apipe leading K. GRANDJEAN.

Copies of this patent may be obtained for velcents each, by addressing theV Commissioner of Patents, v Y Washington, D. C. 

